Surface Tension and Stalk Elongation Drive Dictyostelium Morphogenesis
We investigate the mechanical principles underlying fruiting body morphogenesis in Dictyostelium discoideum. Quantitative shape analysis based on the Young--Laplace law, together with AFM indentation measurements, indicate surface tension as the dominant tissue-scale force acting on the culminating fruiting body. Based on this observation, we construct a hydrodynamic phase-field model with…
A study has been conducted to uncover the mechanical principles behind the formation of fruiting bodies in Dictyostelium discoideum. Researchers employed a quantitative shape analysis method based on the Young--Laplace law, complemented by atomic force microscopy (AFM) indentation measurements. These measurements revealed that surface tension is the primary force acting on the fruiting body at the tissue level.
To further explore this phenomenon, the scientists created a hydrodynamic phase-field model that incorporates adjustable surface and interfacial tensions. By analyzing the model numerically, they discovered that the development of a stalk is a natural outcome of a dewetting process. Through detailed comparisons with experimental data, they were able to pinpoint the specific mechanical conditions necessary for the detachment from the substrate and the development of the distinctive morphology of the fruiting body.
The findings of this research emphasize the critical role that stalk-tip elongation, coupled with tissue-scale surface and interfacial tensions, plays in the creation of large-scale, three-dimensional tissues within Dictyostelium discoideum.
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